#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	double a, b, c;
	a=1234.5678;
	b=1133431.3134;
	c=88;

	cout << "c = " << noshowpoint <<  c << endl << endl;

	cout << "a = " << a << endl;
	cout << "b = " << b << endl;
	cout << "c = " << c << endl << endl;

	cout << "a = " << setprecision(2) << fixed <<  a << endl;
	cout << "b = " << setprecision(2) << fixed <<  b << endl;
	cout << "c = " << setprecision(2) << fixed <<  c << endl << endl;

	cout << "a = " << setprecision(2) << scientific <<  a << endl;
	cout << "b = " << setprecision(2) << scientific <<  b << endl;
	cout << "c = " << setprecision(2) << scientific <<  c << endl << endl;

	
	cout.precision(3);
	cout << "a = " << showpoint <<  a << endl;
	cout << "b = " << showpoint <<  b << endl;
	cout << "c = " << showpoint <<  c << endl << endl;

	// memory size of several frequently used data type
	cout << "The size of boolean is: "<< sizeof(bool) << " Bytes\n";
	cout << "The size of character is: "<< sizeof(char) << " Bytes\n";
	cout << "The size of integer is: "<< sizeof(int) << " Bytes\n";
	cout << "The size of float is: "<< sizeof(float) << " Bytes\n";
	cout << "The size of double is: "<< sizeof(double) << " Bytes\n";
	cout << "The size of long integer is: "<< sizeof(long int) << " Bytes\n";


	// showing the difference between p++ and ++p; 
	int p, q; 
	
	p=3;
 	q=p++;   
	cout << "p=3;   q=p++;" << endl;
	if (p==4 && q==3)   // introduce the operator  && 
		cout << "p=3 and q=4" << endl;
	else if (p==4 && q==4)
		cout << "p=4 and q=4" << endl;
	// first, q=p; then p++;  
	// therefore, q=3 and p=4 after this statement
	
	p=3;
	q=++p;	
	cout << "p=3;   q=++p;" << endl;
	if (p==4 && q==3)
		cout << "p=3 and q=4" << endl;
	else if (p==4 && q==4)
		cout << "p=4 and q=4" << endl;
	// first, ++p; then q=p; 
	// therefore, q=p=4 after this statement
}